Meassurements magnitudes
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1. This document discusses measurement units and the International System of Units. It explains that a physical magnitude is any property that can be measured, such as temperature or volume, and that units are needed to quantify how many times a magnitude contains a standard unit. 2. The International System of Units standardizes units across countries to avoid confusion. The main units are the meter, kilogram, second, ampere, kelvin, mole, and candela. Surface area is measured in square meters and volume in cubic meters, though liters are commonly used for volume. 3. Multiples and submultiples of units are used to measure very large or small quantities, as shown in a table. Conversion factors express
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Learning Objectives
Define the International System of Units (measurement system).
Define a unit of measurement and demonstrate the ability to convert measurements.
Define length, temperature, time, volume, mass, density, and concentration.
Define significant figures and describe measurement techniques.
Introduction
Just like you and your friend communicate using the same language, scientists all over the world need to use the same language when reporting the measurements they make. This language is called the metric system. In this lesson we will cover the metric units for length, mass, density, volume and temperature, and also discuss how to convert among them.
Metric Measurement
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. You use all kinds of measurements each day. How much sugar is needed in the cookies you are baking? Will it be warm enough to leave your jacket at home? How fast are you driving? How much will a bag of apples cost? How much time will it take you to get home from work?
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Exercise 1: Measurements and the Microscopes
Break-out Group Number:
Section:
Student Names (First and Last)
Student Panther ID #s
Johana Rodriguez
6173932
Jason Charles
6123334
jiuyi huang
6126684
iffat mahmood
3994473
_____________________________________________________________________________
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1. Understand measurements and conversions of the metric system.
2. Learn how to properly use both compound and dissecting microscopes.
_____________________________________________________________________________
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____________________________________________________________________________
Task 1 - MEASUREMENTS IN SCIENCE: Familiarize yourself with the metric system.
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Table 1:
Prefix
Abbreviation
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p
0.000000000001
Nano
n
0.000000001
Micro
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Milli
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Base unit
-----
1
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da
10
Hector
h
100
Kilo
k ...
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Define a unit of measurement and demonstrate the ability to convert measurements.
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Introduction
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4. 2 miles = 10,560 ft
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This document provides information about different units of measurement for time, length, area, capacity/volume, and weight. It defines common units like seconds, minutes, hours, meters, centimeters, liters, milliliters, ounces, pounds, and kilograms. It also explains how to read analog clocks, use rulers to measure length, and properly measure liquids and other items using measuring cups. Concepts covered include significant figures, prefixes like kilo and milli, and converting between metric and U.S. customary units.
Exercise 1 Measurements and the MicroscopesBreak-out Group Nu
Exercise 1: Measurements and the Microscopes
Break-out Group Number:
Section:
Student Names (First and Last)
Student Panther ID #s
Johana Rodriguez
6173932
Jason Charles
6123334
jiuyi huang
6126684
iffat mahmood
3994473
_____________________________________________________________________________
OBJECTIVES:
1. Understand measurements and conversions of the metric system.
2. Learn how to properly use both compound and dissecting microscopes.
_____________________________________________________________________________
INTRODUCTION:
Numbers and measurements impact every part of our lives, and are tools that scientists, engineers, astronauts, chefs and doctors use to analyze data, build bridges, fly orbiters into space, adjust recipes, and prescribe medication. Collecting and analyzing data allows us to understand patterns in the natural world that are not easily observed with the naked eye, and the natural variation that is inherent to all organisms is the major reason we need measurements. In today’s lab you will learn about basic measurements and common instruments used by scientists on a daily basis. Your ability to learn and use these concepts will be tested and reinforced throughout the semester.
____________________________________________________________________________
Task 1 - MEASUREMENTS IN SCIENCE: Familiarize yourself with the metric system.
Recall from last week that a key component of the scientific method is experimentation. This step is necessary for the collection of data that will either lend support to, or lead to the rejection of, the hypothesis being tested. In general, data can be qualitative or quantitative. Qualitative data describe variables based on quality (e.g. smell, appearance, texture, etc) and are usually gathered through interviews, pictures, field notes and/or surveys. Quantitative data define the quantity of a variable through measurements (e.g. length, area, cost, height, age, etc.). The main disadvantage of qualitative data is that they are often too subjective (what smells good to one individual might not smell equally well to another). Therefore, quantitative data, which can be statistically manipulated and analyzed, are the preferred choice of most scientists because they provide objective, less biased measures. However, we will examine both types of data in greater detail throughout the semester.
The metric system is used as the international standard to make measurements worldwide. It is based on units of ten (see Table 1 and 2). In contrast, the Imperial Units of Measurement is based on historical precedent, e.g., a foot was first measured as the length of a man’s foot. Because the metric system is widely employed throughout the scientific arena, it will be covered in this lab.
Table 1:
Prefix
Abbreviation
Division or Multiple of Metric Unit
Pico
p
0.000000000001
Nano
n
0.000000001
Micro
µ
0.000001
Milli
m
0.001
Centi
c
0.01
Deci
d
0.1
Base unit
-----
1
Deka
da
10
Hector
h
100
Kilo
k ...
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Based on measurements taken using a virtual density lab, the key findings were:
1) A material has a constant density that does not change, even if the mass or volume changes.
2) The density of a material can be used to identify it and is calculated as density (D) = mass (M) / volume (V).
3) Materials with a higher density than water will sink, while those with a lower density will float, explaining why wood floats but aluminum sinks.
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This document discusses the International System of Units (SI), which is the standard system of measurement used internationally, especially in science. It notes that SI provides a coherent and rationalized system of measurements based around powers of ten. Key aspects of SI include standardized prefixes that indicate multiplicative factors of units and a unified system of measuring length, mass and volume. SI aims to make scientific measurements easily understood worldwide.
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The document discusses measurement systems including the metric and imperial systems. It provides details on:
- The metric system being the international standard and its base units of the meter, gram, and liter.
- Prefixes that are used to indicate multiples or fractions of the base units like kilo- and milli-.
- The imperial system still being used in some countries and contexts, having inconsistent definitions between places.
- Various units of measurement for length, area, volume, mass and their relationships to the base metric units.
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2. Various scientific terms are defined such as area, volume, density, temperature, and pressure. Formulas are provided for calculating concepts like area, volume, and density.
3. The relationships between different variables are explored, such as how temperature, pressure, and phase affect volume and density. Graphs including line graphs, circle graphs, and bar graphs are also introduced.
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2. The International System of Units (SI or metric system) is described as the standard system of measurement used by most scientists and almost all countries. The base SI units for length, mass, volume, density, and temperature are defined.
3. Safety symbols are mentioned and students are instructed to always follow lab safety procedures and instructions carefully.
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Meassurements magnitudes
- 1. 1 MEASUREMENTS AND MAGNITUDES.INTERNATIONAL UNITS SYSTEM.MULTIPLES AND SUBMULTIPLES.SCIENTIFIC NOTATION. A Physical Magnitude is any property that can be measured. For example, temperature and volume are magnitudes but beautiful or happiness are not. But, what is to measure? To measure a magnitude is to compare it with another that we have chosen as unit to determine how many times the magnitude contains the unit. For measuring we need a unit. We cannot say “that glass has a volume of 300”, we need to indicate the unit in which we measure. INTERNATIONAL SYSTEM OF UNITS. To avoid misunderstandings when we talk about measurements, it is necessary to use the same Unit System for everybody. That is what the International Units System represents for most of the countries in our world. According to it, the main units are the following: Notice that the International Unit System for measuring surfaces will be the square meter (m2) and for volumes will be the cubic meter (m3) although the most used unit for volumes is the litre (L) which is the same as 1 dm3 MULTIPLES AND SUBMULTIPLES Sometimes, for measuring very large or very small quantities it is useful to use different units than the ones of the International System. For that reason, we use the multiples and submultiples than can be seen in the next table:
- 2. 2 CONVERSION FACTORS. To change from one unit to another we use conversion factors. A conversion factor is a fraction that expresses the equivalence between two units. For example: From the equivalence 1 m =102 cm We can obtain two conversion factors:
- 3. 3